Tonsil displacements during the cardiac cycle in controls and patients with Chiari I malformation with and without syringomyelia

No.Tonsil Displacement (mm)SD (mm)Range (mm)
Controls60.430.060.12–0.71
Patients with Chiari I110.570.040.23–0.78
    Without syringomyelia70.500.050.23–0.71
    With syringomyelia40.610.030.45–0.78